Improvement in treadle-motion



CHARLES M. GUESS,

strut fil Letters Patent N 106,813, dated August 30, 1870.

IMPROVEMENT Ill? TREADLE-MOI'ION.

The Schedule referred to in these Letters Patent and making part of the same.

To all whmnit may concern:

Be it known that 1, CHARLES M. Guess, of New Orleans, in the parish of Orleans and State of Louisiana, have invented a new and improved Treadle-lilotion; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing forpfing a part of this specification.

My invention relates to treadle devices, and my principal object is to secure a. more convenient mechanism for operating sewing-machines.

The invention consists in certain improvements which will be first described in connection with all that is necessary to a full understanding thereof, and then clearly specified in the summary or claim.

Figure 1 is a front view;

Figure 2, avcrtical section through one of the pulleys: and

Figure 3, a transverse vertical section through the pulleyshait.

A is the driving-shaft of a sewing-machine, turning in bearings 13;

D is a balance-wheel, fast on the shaft; and

U C, ratchet-wheels, tirmly attached to its sides.

E F represent loosc pulleys, having pawls G, held by spring pressure to the ratchetavhecls.

H K are belts, attached to the loose pulleys, and wound about them in the same direction.

I is the tbot-treadlc, and

L an independent arm, both attached to the rocking-shaft M, but on opposite sides, and each having one of the belts affixed to its outer end.

Each of the pulleys E F is provided with a retracting spring, H, but of dili'erent-tensional power.

The pulley F requires a spring with just sufficient tension to wind up the loose belt K, as the shaft M is vibrated by the foot of the operator, while the pulley E requires suiiioient tension to rotate the shaft A to a certain distance, in spite of the resistance of the light spring of the other pulley. i The mode of operationis as follows: i A person, placing his foot upon the treadle I, rol tates the shaft :1. half revolution, (or, according to the relative length of the arc in which the treadle moves,) and the circumference of pulley, while the light spring of pulley F winds up its belt K. The foot of'the operator being removed, the strong spring or pulley E winds belt H, raises arm H, vibrates shaft M, depresses arm L, and unwinds belt K, thereby continuing the rotation of shaft A.

Of course, each pressure of the foot exerts double the power which it would on a single treadle, and this additional power is stored up in the strong spring of pulley E, to'be utilized on the return movement.

The power, however, required to propel thedrivingshaft oi'a sewing-machine is small, and the diiference in amount is scarcely perceptible to the operator.

Having described all that is necessary to an understanding of my invention,

What I claim as new, and desire to secure by Letters Patent, is I 1. The arrangement in pulleys E F of a sewingmachine treadle device, of unequal and reveiscly-opcrating springs H H, as and for the purpose described. 2. The two reversely-operating and nnequalsprings ,I H H, loose pulleys E F, and opposite arms I L of rock-shaft M, combined with two belts K H, passing over their respective pulleys in the some direction, as and for the purpose described.

The above specification of my invention signed by me this 17th day of May, 1870.

' CHARLES M. GUESS.

GEO. W. Mamas,

' Witnesses:

l ALEX. F. Runners. 

